Cycle performance of a packed bed based cold storage device

doi:10.12028/j.issn.2095-4239.2017.0083

Abstract

Abstract: We studied numerically a packed bed based cold energy storage device—A key component of liquid air energy storage (LAES) system and could play an important role in the system efficiency enhancement of LAES. Both the charging and discharging performance and associated efficiency were studied. Low cycle efficiency is found when the packed bed was fully charged/discharged in the first few cycles; suggesting that the outlet air temperature should be controlled with a cut-off point for each cycle. The packed bed based cold storage device approaches steady state after a number of cycles, with the charge/discharge processes repeatable, indicating the cold utilization efficiency of ~100% could be achieved. We also examined the effects of bed height, packed particle size and the cut-off point temperature on the performance. The results showed very low effective storage volume ratio. This should be considered when the storage device is scaled up.

Key words: liquid air energy storage, pellet bed for cold storage, efficiency, cycle performance

JIN Yi1, WANG Le1, YANG Cenyu1, SONG Jie1, XU Chao2. Cycle performance of a packed bed based cold storage device[J]. Energy Storage Science and Technology, 2017, 6(4): 708-718.

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